In both the above cases, ensure that there is good spread (low to high) and good organisation (clear differences between high, middle and low values).
There is no easy way to review the hue of your image except by looking at it. Hue is organized according to the following two values...

Hue variety...

The amount of perceptually different hue values. Monochrome painting have low hue variety, colorful paintings have high hue variety.

Hue antagonism...

Any hue values on opposite sides of the RYB hue wheel can be said to be in an antagonistic relationship with each other.

Hw
The aim of this assignment is to ruin the school or part of the school.
You will need to take your own photograph. Camera phone resolution will not be enough.
For exterior, you are advised to use golden hour light.
It is also advised that you use a tripod.
Some things to rember about ruins:
The broken profile signifies it as a ruin. Be bold with this profile. Take care to maintain strong positive and negative shapes. Frequently ruins will have holes that run right through them (eg windows).
Accumulation of debris at ground level.
Piling of debris up the sides of vertical surfaces.
Staggered range of chunk sizes: large, medium and small.
Use texture. Cg textures is very useful.
A ruin is a building that has been disassembled. It therefore pays to have some knowledge of how buildings are made. A modern building will be built around a concrete frame. An old building will be made of bricks or timber.
Cracks in plaster have their own mechanics. They will often start at holes in the plaster or from architectural features (eg a window ledge or a door frame), and fork like lightening before fading out.